perl - update

Hi!
My system: FreeBSD 8.1
I like to update perl to higher version and I don't want to screw up...
I red /usr/ports/UPDATING:
"perl-after-upgrade" script supplied with lang/perl5.12
If I update to perl 5.12.3 is it enough that I run above script, please?
In /etc/make.conf I have:
# added by use.perl 2010-11-05 17:40:46
PERL_VERSION=5.8.9
I have above from version 8.0. Do I need to change version from 5.8.9 to 5.12
or to 5.12.3?
Thank you very much.
Mitja
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